public static bool IsInCheck([NotNull] this GamePosition gamePosition, GameSide side)
{
if (gamePosition is null)
{
throw new ArgumentNullException(nameof(gamePosition));
}
var king = side.ToPiece(PieceType.King);
var attackingSide = side.Invert();
var kingSquares = gamePosition.PiecePosition[king].GetSquares();
return(gamePosition.IsAnyUnderAttack(kingSquares, attackingSide));
}
protected GamePosition([NotNull] GamePosition other)
{
if (other is null)
{
throw new ArgumentNullException(nameof(other));
}
var otherType = other.GetType();
if (otherType != GetType())
{
throw new ArgumentException($@"Invalid object type '{otherType.GetFullName()}'.", nameof(other));
}
PiecePosition = other.PiecePosition.Copy();
ActiveSide = other.ActiveSide;
FullMoveIndex = other.FullMoveIndex;
}
public static bool IsAnyUnderAttack(
[NotNull] this GamePosition gamePosition,
[NotNull] ICollection <Square> targetSquares,
GameSide attackingSide)
{
if (gamePosition is null)
{
throw new ArgumentNullException(nameof(gamePosition));
}
if (targetSquares is null)
{
throw new ArgumentNullException(nameof(targetSquares));
}
var result = targetSquares.Count != 0 &&
targetSquares.Any(targetSquare => gamePosition.IsUnderAttack(targetSquare, attackingSide));
return(result);
}
public abstract bool IsSamePosition([NotNull] GamePosition other);
public override bool IsSamePosition(GamePosition other) => IsSamePosition(other as StandardGamePosition);